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Install and configure controller node for Red Hat Enterprise Linux and CentOS

This section describes how to install and configure the placement service on the controller node.

Prerequisites

Before you install and configure the placement service, you must create a database, service credentials, and API endpoints.

Create Database

To create the database, complete these steps:

Use the database access client to connect to the database server as the root user:
```
$ mysql -u root -p
```

Create the placement database:

MariaDB [(none)]> CREATE DATABASE placement;

Grant proper access to the database:

MariaDB [(none)]> GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'localhost' \
  IDENTIFIED BY 'PLACEMENT_DBPASS';
MariaDB [(none)]> GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'%' \
  IDENTIFIED BY 'PLACEMENT_DBPASS';

Replace PLACEMENT_DBPASS with a suitable password.

Exit the database access client.

Configure User and Endpoints

Install and configure components

Install the packages:
```
# yum install openstack-placement-api
```
Edit the /etc/placement/placement.conf file and complete the following actions:
- In the [placement_database] section, configure database access:
```
[placement_database]
# ...
connection = mysql+pymysql://placement:PLACEMENT_DBPASS@controller/placement
```
  Replace PLACEMENT_DBPASS with the password you chose for the placement database.
- In the [api] and [keystone_authtoken] sections, configure Identity service access:
```
[api]
# ...
auth_strategy = keystone

[keystone_authtoken]
# ...
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = placement
password = PLACEMENT_PASS
```
  Replace PLACEMENT_PASS with the password you chose for the placement user in the Identity service.
  
  Note
  
  Comment out or remove any other options in the [keystone_authtoken] section.
Populate the placement database:
```
# su -s /bin/sh -c "placement-manage db sync" placement
```
Note

Ignore any deprecation messages in this output.

Finalize installation

Restart the httpd service:
```
# systemctl restart httpd
```

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